diff --git a/src/Result.php b/src/Result.php
index d9f1f0e3..9b3a83e5 100644
--- a/src/Result.php
+++ b/src/Result.php
@@ -54,8 +54,8 @@ public static function exitCode(Configuration $configuration, TestResult $result
                 $returnCode = self::FAILURE_EXIT;
             }
 
-            $warnings = $result->numberOfTestsWithTestTriggeredPhpunitWarningEvents() +
-                +count($result->warnings())
+            $warnings = $result->numberOfTestsWithTestTriggeredPhpunitWarningEvents()
+                + count($result->warnings())
                 + count($result->phpWarnings());
 
             if ($configuration->failOnWarning() && $warnings > 0) {